Injection molding extrusion head
By setting a first and second material chambers in the injection molding cylinder of the injection molding equipment, and setting an injection molding channel and a feeding channel at the injection molding head to control the extrusion speed of the plastic raw materials, the problem of high requirements for the extrusion head during the internal and external double-layer molding of the existing injection molding equipment is solved, and the effect of double-layer molding and cost reduction is achieved.
Patent Information
- Application Number
- CN202421811810.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-29
AI Technical Summary
When existing injection molding equipment realizes the molding of double-layer plastics inside and outside, the extrusion head has high requirements, making it difficult to effectively control the extrusion and molding of plastics of different materials.
An injection molding extrusion head is designed. By separating the first material cavity and the second material cavity in the injection molding cylinder, and setting an injection molding channel and a feeding channel at the injection molding head, the extrusion speed of the plastic raw material in the first material cavity and the second material cavity is controlled, so that the plastic of the second material cavity is coated outside the plastic of the first material cavity, and double-layer molding is achieved.
Double-layer molding of plastics made of different materials inside and outside is achieved, meeting the different needs of the outer wall and inner cladding materials of the product, strengthening product strength and reducing production costs.
Smart Images
Figure CN222920971U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of injection molding equipment, and particularly relates to an injection molding extrusion head. Background Art
[0002] With the rise of the plastic industry, injection molding machines, as one of the main equipment for plastic molding, have experienced continuous evolution from manual operation to automation, from simple to complex, and from low-end to high-end. With the progress of technology, injection molding machines have gradually achieved electrification, hydraulicization, and all-electricity, greatly improving production efficiency and molding accuracy. Especially in recent years, with the development of computer technology, automatic control, sensor technology, and the Internet of Things, modern injection molding machines are increasingly tending towards high precision, high efficiency, and intelligence.
[0003] However, no matter how the injection molding equipment develops, it mainly relies on its own structure to heat and extrude hot plastic and cool it into a shape. Therefore, improvements in the structure can achieve the purpose of production at a lower cost. Since there are many ways to mix the materials of plastics, it is mainly necessary to perform injection molding according to the usage requirements of the actual product. Especially when two different plastics inside and outside are extruded simultaneously, the external and internal plastics of the product present different materials. However, this extrusion method has high requirements for the extrusion head. Summary of the Utility Model
[0004] To solve the above technical problems, the utility model provides an injection molding extrusion head. By separately arranging a first material cavity and a second material cavity in the injection molding barrel to place molten plastics of different materials, an injection molding head is arranged in the extrusion cavity of the injection molding barrel. The plastics in the first material cavity and the second material cavity converge at the injection molding head. By changing the extrusion speeds of the first material cavity and the second material cavity, the plastic in the second material cavity is coated outside the plastic in the first material cavity, and after extrusion, different materials of plastics inside and outside can be formed in the mold.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is:
[0006] An injection molding and extrusion head, comprising an injection molding barrel and an injection molding head. A first material cavity, a second material cavity and an extrusion cavity are provided inside the injection molding barrel. The first material cavity and the second material cavity are respectively communicated with the extrusion cavity. A first feeding component and a second feeding component are provided on the outer side wall of the injection molding barrel. The first feeding component is communicated with the first material cavity. The first feeding component includes a first feeding cylinder, a first screw, a first motor and a first feeding tube. The first feeding cylinder penetrates through the injection molding barrel and is communicated with the first material cavity. The first screw is fitted inside the first feeding cylinder. The first motor is arranged at the end of the first feeding cylinder. The output end of the first motor is connected to the first screw. The first feeding tube penetrates through and is communicated with the first feeding cylinder. The first material cavity coincides with the central axis of the injection molding barrel. A butting tube is provided at the connection between the first material cavity and the extrusion cavity. The second material cavity is communicated with the extrusion cavity through a flow channel. The second feeding component is communicated with the second material cavity. The second feeding component includes a second feeding cylinder, a second screw, a second motor and a second feeding tube. The second feeding cylinder penetrates through the injection molding barrel and is communicated with the second material cavity. The second screw is fitted inside the second feeding cylinder. The second motor is arranged at the end of the second feeding cylinder. The output end of the second motor is connected to the second screw. The second feeding tube penetrates through and is communicated with the second feeding cylinder. An injection molding channel and a feeding channel are provided on the injection molding head. The injection molding channel penetrates through the central axis of the injection molding head. The feeding channel penetrates through the injection molding head from the outer side wall of the injection molding head and is communicated with the injection molding channel. The injection molding head is arranged inside the extrusion cavity. The nozzle on the injection molding head penetrates out of the opening of the extrusion cavity. The injection molding channel is communicated with the first material cavity. The feeding channel is communicated with the second material cavity. The injection molding channel is divided into a buffer channel and a butting channel inside. The feeding channel is communicated with the buffer channel. The feeding channel corresponds to the flow channel. The butting channel is matched with the butting tube.
[0007] The injection extrusion head adopting this structure is provided with a first material cavity, a second material cavity and an extrusion cavity in the injection barrel. Different plastic raw materials are placed in the first material cavity and the second material cavity respectively. Both the first material cavity and the second material cavity are communicated with the extrusion cavity. Therefore, after continuously loading plastic raw materials into the first material cavity and the second material cavity, the first material cavity can enter the extrusion cavity through the butting pipe, and the second material cavity can enter the extrusion cavity through the flow channel. In order to continuously fill the first material cavity and the second material cavity with plastic raw materials, a first feeding component is set to communicate with the first material cavity. The first feeding cylinder communicated with the first material cavity is used to provide a channel for the plastic raw materials in the first feeding cylinder communicated with it to enter the first material cavity. In order to control the speed and capacity of the plastic raw materials entering the first material cavity, a first screw is fitted in the first feeding cylinder. The first screw is driven by a first motor, so that during the rotation of the first screw, the plastic raw materials in the first feeding cylinder are pushed into the first material cavity. The fed plastic raw materials will push the plastic raw materials originally in the first material cavity into the extrusion cavity through the butting pipe. The second feeding component is set to communicate with the second material cavity. The second feeding cylinder communicated with the second material cavity is used to provide a channel for the plastic raw materials in the second feeding cylinder communicated with it to enter the second material cavity. In order to control the speed and capacity of the plastic raw materials entering the second material cavity, a second screw is fitted in the second feeding cylinder. The second screw is driven by a second motor, so that during the rotation of the second screw, the plastic raw materials in the second feeding cylinder are pushed into the second material cavity. The fed plastic raw materials will push the plastic raw materials originally in the second material cavity into the extrusion cavity through the flow channel. Therefore, by controlling the opening and closing of the first motor and the second motor, the extrusion of the plastic raw materials in the first material cavity and the second material cavity can be controlled.
[0008] In order to separate the plastic raw materials entering the extrusion cavity from the first material cavity and the second material cavity, an injection head is arranged in the extrusion cavity. The injection head is provided with an injection channel and a feeding channel. The injection channel runs through the central axis of the injection head. The injection channel is butted with the butting pipe, and the feeding channel runs through the injection head from the outer wall of the injection head and is communicated with the injection channel. The feeding channel corresponds to the flow channel. Therefore, the plastic raw materials in the first material cavity will enter the injection channel, and the plastic raw materials in the second material cavity will enter the feeding channel through the flow channel. The plastic raw materials in the feeding channel and the injection channel are converged. Therefore, when separately controlling the extrusion of the plastic raw materials in the first material cavity and the second material cavity, the plastic raw materials in the first material cavity can be first controlled to be extruded into the injection channel to first fill the injection channel, and then the plastic raw materials in the second material cavity are extruded into the injection channel. While the plastic raw materials in the second material cavity are continuously extruded, the plastic raw materials in the first material cavity will coat on it. Therefore, when the mixed plastic raw materials are extruded from the nozzle and enter the mold, the plastic raw materials in the first material cavity on the outer layer will fill on the outer side of the mold, and the plastic raw materials in the second material cavity on the inner layer will be inside the mold, thus realizing double-layer extrusion molding.
[0009] Further, it further includes a touch component, the touch component includes a spring and a high-temperature resistant proximity switch. The high-temperature resistant proximity switch is arranged at the bottom of the extrusion cavity. The spring is sleeved on the outer side wall of the butting pipe. One end of the spring abuts against the bottom of the extrusion cavity, and the other end of the spring abuts against the bottom of the injection head. The spring and the high-temperature resistant proximity switch do not contact each other. The bottom of the injection head is detachably connected to the high-temperature resistant proximity switch. A limiting post is arranged on the outer side wall of the injection head, and a limiting groove is arranged on the inner side wall of the extrusion cavity. The limiting post and the limiting groove cooperate with each other. A flange is detachably connected to the opening of the extrusion cavity. The inner side wall of the flange abuts against the outer side wall of the injection head. The nozzle passes through the middle circular hole of the flange.
[0010] Compared with the prior art, the advantages of the present utility model are as follows: By controlling the plastic raw material in the first material cavity to be extruded into the injection channel, the injection channel is first filled, and then the plastic raw material in the second material cavity is extruded into the injection channel. While the plastic raw material in the second material cavity is continuously extruded, the plastic raw material in the first material cavity will be coated on it. Therefore, when the mixed plastic raw material is extruded from the nozzle and enters the mold, the plastic raw material in the first material cavity on the outer layer will fill the outer side of the mold, and the plastic raw material in the second material cavity on the inner layer will be inside the mold, thereby realizing double-layer extrusion molding. This injection extrusion head is particularly suitable for cases where the outer side wall of the product to be formed is made of a material that meets the user's usage requirements, while the plastic coated on the inner layer is a low-cost and not very excellent high-strength material. Different materials inside and outside can strengthen the product strength while reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0012] Figure 1 is a three-dimensional view of the present utility model;
[0013] Figure 2 is a semi-sectional three-dimensional view of the present utility model;
[0014] Figure 3 is a semi-sectional three-dimensional exploded view of the present utility model;
[0015] Figure 4 is a front view of the present utility model;
[0016] Figure 5 is of the present utility modelFigure 4 A-A sectional view thereof;
[0017] Figure 6 is of the present utility model Figure 4 B-B sectional view thereof.
[0018] Wherein: 1, injection barrel; 11, first material cavity; 111, abutting pipe; 12, second material cavity; 121, runner; 13, extrusion cavity; 131, limiting groove; 132, flange; 14, first feeding assembly; 141, first feeding pipe; 142, first screw; 143, first motor; 144, first feeding barrel; 15, second feeding assembly; 151, second feeding pipe; 152, second screw; 153, second motor; 154, second feeding barrel; 2, injection head; 21, injection channel; 211, buffer channel; 212, abutting channel; 22, feeding channel; 23, nozzle; 24, limiting post; 3, touch assembly; 31, spring; 32, high-temperature proximity switch. Detailed implementation manners
[0019] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described clearly and completely below. Apparently, the described embodiments are only a part rather than all of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope protected by the present utility model.
[0020] The following will describe the detailed implementation manners of the present utility model with reference to the drawings:
[0021] Such as Figures 1-6As shown in the figure, an injection extrusion head includes an injection cylinder 1 and an injection head 2. A first material cavity 11, a second material cavity 12, and an extrusion cavity 13 are provided in the injection cylinder 1. The first material cavity 11 and the second material cavity 12 are respectively communicated with the extrusion cavity 13. A first feeding assembly 14 and a second feeding assembly 15 are provided on the outer side wall of the injection cylinder 1. The first feeding assembly 14 is communicated with the first material cavity 11. The first feeding assembly 14 includes a first feeding cylinder, a first screw 142, a first motor 143, and a first feeding tube 144. The first feeding cylinder penetrates through the injection cylinder 1 and is communicated with the first material cavity 11. The first screw 142 is fitted in the first feeding cylinder. The first motor 143 is arranged at the end of the first feeding cylinder. The output end of the first motor 143 is connected to the first screw 142. The first feeding tube 144 penetrates through and is communicated with the first feeding cylinder. The first material cavity 11 coincides with the central axis of the injection cylinder 1. A butting tube 111 is provided at the connection between the first material cavity 11 and the extrusion cavity 13. The second material cavity 12 is communicated with the extrusion cavity 13 through a flow channel 121. The second feeding assembly 15 is communicated with the second material cavity 12. The second feeding assembly 15 includes a second feeding cylinder, a second screw 152, a second motor 153, and a second feeding tube 154. The second feeding cylinder penetrates through the injection cylinder 1 and is communicated with the second material cavity 12. The second screw 152 is fitted in the second feeding cylinder. The second motor 153 is arranged at the end of the second feeding cylinder. The output end of the second motor 153 is connected to the second screw 152. The second feeding tube 154 penetrates through and is communicated with the second feeding cylinder. An injection channel 21 and a feeding channel 22 are provided on the injection head 2. The injection channel 21 penetrates through the central axis of the injection head 2. The feeding channel 22 penetrates through the injection head 2 from the outer side wall of the injection head 2 and is communicated with the injection channel 21. The injection head 2 is arranged in the extrusion cavity 13. The nozzle 23 on the injection head 2 penetrates out of the opening of the extrusion cavity 13. The injection channel 21 is communicated with the first material cavity 11. The feeding channel 22 is communicated with the second material cavity 12. The injection channel 21 is divided into a buffer channel 211 and a butting channel 212. The feeding channel 22 is communicated with the buffer channel 211. The feeding channel 22 corresponds to the flow channel 121. The butting channel 212 is matched with the butting tube 111.
[0022] Further, it further includes a touch component 3. The touch component 3 includes a spring 31 and a high-temperature proximity switch 32. The high-temperature proximity switch 32 is arranged at the bottom of the extrusion cavity 13. The spring 31 is sleeved on the outer side wall of the abutting pipe 111. One end of the spring 31 abuts against the bottom of the extrusion cavity 13, and the other end of the spring 31 abuts against the bottom of the injection head 2. The spring 31 and the high-temperature proximity switch 32 do not contact each other. The bottom of the injection head 2 is in abutting connection with the high-temperature proximity switch 32; a limiting column 24 is arranged on the outer side wall of the injection head 2, and a limiting groove 131 is arranged on the inner side wall of the extrusion cavity 13. The limiting column 24 is matched with the limiting groove 131; a flange 132 is detachably connected to the opening of the extrusion cavity 13. The inner side wall of the flange 132 abuts against the outer side wall of the injection head 2, and the nozzle 23 passes through the middle round hole of the flange 132.
[0023] Description of the working mode of the present utility model:
[0024] For the injection and extrusion head adopting this structure, a first material cavity 11, a second material cavity 12 and an extrusion cavity 13 are arranged in the injection barrel 1. Different plastic raw materials are placed in the first material cavity 11 and the second material cavity 12 respectively. Both the first material cavity 11 and the second material cavity 12 are communicated with the extrusion cavity 13. Therefore, after continuously loading plastic raw materials into the first material cavity 11 and the second material cavity 12, the first material cavity 11 can enter the extrusion cavity 13 through the butting pipe 111, and the second material cavity 12 can enter the extrusion cavity 13 through the flow channel 121. In order to continuously fill the first material cavity 11 and the second material cavity 12 with plastic raw materials, a first feeding assembly 14 is arranged to communicate with the first material cavity 11. The first feeding cylinder communicated with the first material cavity 11 serves to provide a channel for the plastic raw materials in the first feeding cylinder 144 communicated with it to enter the first material cavity 11. In order to control the speed and capacity of the plastic raw materials entering the first material cavity 11, a first screw 142 is fitted in the first feeding cylinder. The first screw 142 is driven by a first motor 143, so that during the rotation of the first screw 142, the plastic raw materials in the first feeding cylinder 144 are pushed into the first material cavity 11. The fed plastic raw materials will push the plastic raw materials originally in the first material cavity 11 to enter the extrusion cavity 13 through the butting pipe 111; a second feeding assembly 15 is arranged to communicate with the second material cavity 12. The second feeding cylinder communicated with the second material cavity 12 serves to provide a channel for the plastic raw materials in the second feeding cylinder 154 communicated with it to enter the second material cavity 12. In order to control the speed and capacity of the plastic raw materials entering the second material cavity 12, a second screw 152 is fitted in the second feeding cylinder. The second screw 152 is driven by a second motor 153, so that during the rotation of the second screw 152, the plastic raw materials in the second feeding cylinder 154 are pushed into the second material cavity 12. The fed plastic raw materials will push the plastic raw materials originally in the second material cavity 12 to enter the extrusion cavity 13 through the flow channel 121; therefore, by controlling the opening and closing of the first motor 143 and the second motor 153, it is possible to control whether the plastic raw materials in the first material cavity 11 and the second material cavity 12 are extruded or not.
[0025] In order to separate the plastic raw materials entering the extrusion chamber 13 from the first material chamber 11 and the second material chamber 12, an injection head 2 is arranged in the extrusion chamber 13. The injection head 2 is provided with an injection channel 21 and a feeding channel 22. The injection channel 21 runs through the central axis of the injection head 2, and the injection channel 21 is connected to the abutment tube 111, while the feeding channel 22 runs through the injection head 2 from the outer side wall of the injection head 2 and is connected to the injection channel 21. The feeding channel 22 corresponds to the flow channel 121. Therefore, the plastic raw material in the first material chamber 11 will enter the injection channel 21, and the plastic raw material in the second material chamber 12 will enter the feeding channel 22 through the flow channel 121, and the plastic raw materials in the feeding channel 22 and the injection channel 21 will be merged. Therefore, when the first material cavity 11 and the second material cavity 12 are respectively controlled to extrude the plastic raw materials, the plastic raw materials in the first material cavity 11 can be controlled to be extruded into the injection molding channel 21 first, and the injection molding channel 21 is filled first, and then the plastic raw materials in the second material cavity 12 are squeezed into the injection molding channel 21. While the plastic raw materials in the second material cavity 12 are continuously extruded, the plastic raw materials in the first material cavity 11 will be coated on it. Therefore, when the mixed plastic raw materials are extruded from the nozzle 23 and enter the mold, the plastic raw materials in the first material cavity 11 in the outer layer will be filled on the outside of the mold, and the plastic raw materials in the second material cavity 12 in the inner layer will be inside the mold, thereby realizing double-layer extrusion molding.
[0026] Since simply controlling the first motor 143 and the second motor 153 may cause the plastic raw material in the second material cavity 12 to fail to completely cover the plastic raw material in the first material cavity 11 during the subsequent production process due to the starting time difference, a touch component 3 is added. The injection channel 21 of the injection head 2 is divided into a buffer channel 211 and an abutting channel 212. The abutting channel 212 is matched with the abutting pipe 111. Therefore, the injection head 2 can move back and forth in the extrusion cavity 13. To limit the injection head 2 to move in only one direction, a limiting column 24 is provided on the outer side wall of the injection head 2. The limiting column 24 is matched with the limiting groove 131 provided on the inner side wall of the extrusion cavity 13. Therefore, the injection head 2 can only move back and forth under the limitation. A flange 132 is detachably connected to the opening of the extrusion cavity 13. The outer side wall of the injection head 2 is restricted by the flange 132. The round hole in the flange 132 allows the nozzle 23 to pass through. Therefore, the injection head 2 will always stay in the extrusion cavity 13 under the restriction of the flange 132. To keep the injection head 2 abutting against the flange 132 before injection, a spring 31 is provided at the bottom of the injection head 2 to abut against the bottom of the extrusion cavity 13. The spring 31 is sleeved on the outer side wall of the abutting pipe 111. Therefore, when the injection head 2 is abutted against the mold, this stroke distance is fixed. Therefore, under the setting of a fixed stroke, when the injection head 2 abuts against the mold, the second motor 153 is started to extrude the plastic raw material in the second material cavity 12 into the injection channel 21. The continuous pressure on the injection head 2 will cause the spring 31 to deform, causing the injection head 2 to be compressed into the extrusion cavity 13. To enable the first motor 143 to be automatically started when the injection head 2 reaches the bottom, a high-temperature resistant proximity switch 32 is provided at the bottom of the extrusion cavity 13. The high-temperature resistant proximity switch 32 can withstand the high temperature of the injection barrel 1 and the injection head 2 to avoid failure. When the bottom of the injection head 2 abuts against the high-temperature resistant proximity switch 32, the first motor 143 is started to extrude the plastic raw material in the first material cavity 11 into the injection channel 21. Due to the sequential order, the plastic raw material in the second material cavity 12 and the plastic raw material in the first material cavity 11 will always maintain a fixed starting time difference, thus ensuring that each discharge is very uniform and avoiding the situation that the plastic raw material in the second material cavity 12 cannot completely cover the plastic raw material in the first material cavity 11 during the subsequent production process.
[0027] The beneficial effects of the present utility model are as follows: By controlling the plastic raw material in the first material cavity 11 to be extruded into the injection molding channel 21, the injection molding channel 21 is first filled, and then the plastic raw material in the second material cavity 12 is extruded into the injection molding channel 21. While the plastic raw material in the second material cavity 12 is continuously extruded, the plastic raw material in the first material cavity 11 will wrap around it. Therefore, when the mixed plastic raw material is extruded from the nozzle 23 and enters the mold, the plastic raw material in the first material cavity 11 on the outer layer will fill the outer side of the mold, and the plastic raw material in the second material cavity 12 on the inner layer will be inside the mold, thus realizing double-layer extrusion molding. This injection extrusion head is particularly suitable for cases where the outer wall of the product to be molded is made of a material that meets the user's usage requirements, while the plastic wrapped on the inner side is a low-cost and not-so-excellent high-strength material. Different materials inside and outside can strengthen the product strength while reducing production costs.
[0028] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.
Claims
1. An injection molding extrusion head, characterized in that: The invention comprises an injection molding cylinder and an injection molding head, wherein a first material cavity, a second material cavity and an extrusion cavity are arranged in the injection molding cylinder, wherein the first material cavity and the second material cavity are respectively connected with the extrusion cavity, and a first feeding assembly and a second feeding assembly are arranged on the outer wall of the injection molding cylinder, wherein the first feeding assembly is connected with the first material cavity, and the second feeding assembly is connected with the second material cavity, and an injection molding path and a feeding path are arranged on the injection molding head, wherein the injection molding path passes through the central axis of the injection molding head, and the feeding path passes through the injection molding head from the outer wall of the injection molding head and is connected with the injection molding path, the injection molding head is arranged in the extrusion cavity, and the nozzle on the injection molding head passes through the opening of the extrusion cavity, the injection molding path is connected with the first material cavity, and the feeding path is connected with the second material cavity.
2. The injection molding extruder according to claim 1, characterized in that: The first feeding assembly includes a first feeding barrel, a first screw, a first motor and a first feeding barrel. The first feeding barrel passes through the injection barrel and is connected to the first material cavity. The first screw is fitted in the first feeding barrel. The first motor is arranged at the end of the first feeding barrel. The output end of the first motor is connected to the first screw. The first feeding barrel passes through and is connected to the first feeding barrel.
3. The injection molding extruder according to claim 2, characterized in that: The second feeding assembly includes a second feeding barrel, a second screw, a second motor and a second feeding barrel. The second feeding barrel passes through the injection barrel and is connected to the second material cavity. The second screw is fitted in the second feeding barrel. The second motor is arranged at the end of the second feeding barrel. The output end of the second motor is connected to the second screw. The second feeding barrel passes through and is connected to the second feeding barrel.
4. The injection molding extruder according to claim 3, characterized in that: The first material cavity coincides with the central axis of the injection cylinder, a butting tube is provided at the connection between the first material cavity and the extrusion cavity, and the second material cavity is connected with the extrusion cavity through a flow channel.
5. The injection molding extruder according to claim 4, characterized in that: The injection channel is divided into a buffer channel and an abutment channel, the feeding channel is connected to the buffer channel, the feeding channel corresponds to the flow channel, and the abutment channel cooperates with the abutment tube.
6. The injection molding extruder according to claim 5, characterized in that: A limiting column is provided on the outer wall of the injection head, and a limiting groove is provided on the inner wall of the extrusion cavity, and the limiting column cooperates with the limiting groove; a flange is detachably connected to the opening of the extrusion cavity, and the inner wall of the flange abuts against the outer wall of the injection head, and the nozzle passes through the middle circular hole of the flange.
7. The injection molding extruder according to claim 6, characterized in that: It also includes a touch component, which includes a spring and a high-temperature resistant proximity switch. The high-temperature resistant proximity switch is arranged at the bottom of the extrusion cavity, and the spring is sleeved on the outer side wall of the abutment tube. One end of the spring abuts the bottom of the extrusion cavity, and the other end of the spring abuts the bottom of the injection head. The spring and the high-temperature resistant proximity switch do not contact each other, and the bottom of the injection head is abuttably connected to the high-temperature resistant proximity switch.